Jeweler s torch



S. W. HOKE.

JEWELER'S TORCH.

APPLlcmon- FILED rra. 2o. 1920.

Patented July 19, 1921.

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PATENT OFFICE.

SAI W. HOKE, 0F PALISADE, NEW JERSEY.

JEWELERS TORCH.

Specification of Letters Patent.

Patented July 19, 1921.

Application tiled February 20, 1920. Serial No. 360,045.

To all whom it may concern Be it known that I, SAM W. HOKE, a citizen of the United States, and a resident of Palisade, Bergen county, State of New Jersey, have invented certain new and use ful Improvements in Jewelers Torches, of which the following is a specification.

My improvements relate to the torches, so called used by jewelers in soldering, brazing and welding and similar operations, and are desi ed to afford a simple, convenient and efficient appliance of the character designated, that may be manipulated with facilit and accuracy,-and by which the gaseous a mixture may be regulated and controlled effectually and instantaneously in accords ance with the varying requirements and exigencies of use,-the invention consisting in the specific construction, combination and Iarrangement of parts described and claimed, distinctive features relating to the ejector and valve actuation, the assembling of parts, the means of gas conduit attachment, etc., all as hereinafter fully set forth.

In theaccomp'anying drawings,

Figure 1, is a' front elevation of my improved torch;

Fig. 2, is a central longitudinal section thereof;

Fig. 3, is a section taken upon plane of line 3 3, Fig. 2;

Fig. 4, is an elevation in detail of' the ox gen kvalve stem; f

5, is an elevation in detail ofthe gas valve stem;

Fig. 6, is a section taken upon plane of line 6 6, of Fig. 5, on an enlarged scale.

Fig. 7, is a view illustrating the method of manipulating the valves whlch control the supply of gas and oxygen to the ejector.

E may be designated as the bifistulous ejector section of my improved torch, said ejector section being provided with a constrictive nozzle C, of peculiar construction inter osed betwen it and the discharge spout D. To the outer end of thelateral duct e, of said bistulous ejector section E, is screwed one end of the gas valve casing g, and into the other duct e in alinement with the constrictive nozzle C,. is screwed one end of the oxygen valve casin o, as shown more particularlyin Fig. 2, o the drawings, by reference to which it will also be seen that the other extremities of said valve casings g, o, are screw-connected respectively with the inner ends of coupling pipes g', o', the outer extremities of which are in turn screwconnected with the nipples g2, o2, provided for the attachment of the flexible rubber hose/z, (Fig. 3,) by means of which communication 1s had with the supply sources of fuel gas, and of oxygen gas,-the latter under relatively high pressure as compared with the fuel gas.

It may be stated in this connection that my improved torch is designed for use with oxygen under pressure of, sa from one half to ten pounds, and with any uel gas, natural or artificial, hydrocarbon, hydrogen or acetylene, at relatively low pressure, such for instance as that of ordinary illuminating gas supply.

n order to attain a secure attachment of the rubber tube gas conduits with my torch without resort to binding wires, clamps or other extraneous appliances, which are i11- convenient and objectionable for many reasons as related to a hand implement of this character, I make my hose nipples g2, o2, of tapering conoidal configuration, and form them peripherally with barb-like corrugations a, inclined rearward toward an annular base shoulder a', in each case, so as to present a minimum of resistance to insertion within the ends of the rubber hose, while affording a maximum of resistance to removal therefrom, the barbed corrugations embedding themselves in the stretched and expanded rubber tubing as illustrated in Fig. 3, and thereby effecting a substantially positive conjunction between torch and hose connections, sufficient for all practical purposes involved in the usual handling and manipulation of the device.

The annular base shoulder a', on each nipple g2, o2, functions not only as an abutment for the end of the hose k, but also as a rest and support for a bridge plate b, interposed between the nipples g2, o2, and the outer ends of the coupli tubes g', 0,-the ends of said bridge piece being perforated for the insertion of the threaded base ends of said nipples g2, 02, so that the screwing home of the latter secures the bridge piece b, rigidly in position, as will be understood by reference more particularl to Fig. 2, of the drawings. Thus the bri ge piece b, reinforces and stiffens this end of the structure, and incidentally affords a finger rest which facilitates hand manipulation, as in Fig. 7,

inwhich the little finger of the right yhand is presumably resting upon 'and pressed against said bridge piece b.

This Fig. 7, also illustrates the finger and thumb manipulation and control of -the needle valves which regulate the gas and oxygen supply to the ejector section E, and .to facilitate this method of valve actuation the valve stems o, are preferably `formed at theirouter extremities with radially protuberant finger rests o, fv, vas shown more particularly in Fig. lil. By this means the valve stems fu, may be'instantly and conveniently, and positively Vturned 4the fraction of a rotation with accuracy, which is an important factor adapting the torch to expeditious adjustment to the varying requirements .and exigencies of jewelry factory work. y

For this reason also I use needle valves in preference to any other kind, as they are more 4sensitive and quickly responsive in effecting the regulation of'liow to the ejector chamber.

Fig. 3, shows the casing of one of lthese valves in central longitudinal section, by reference to which it will be seen that 'theinlet duct i, and the outlet duct fi, are inclined with relation to the valve seat 2, which is, of course transversely positioned and conoidal to conform to the conoidal valve yU2, Vforming the innerend of the valve stem o. Both valves are essentially the same in construction -and operation except thatth'e valve stem (shown in detail in Fig. 4l) for the oxygen controlling valve is formed ywith a relative fine screw thread s, of slight pitch, while the lvalve stem for the fuel gas control (shown in detail in Fig. 5) is made with 'a coarser screw `thread s', of much steeper pitch, and also with a leak space o", which latter, when the valve is seated, allows sufficient gas to pass to sustain a lpilot flame to obviate the need-of relighting the torch after a temporary suspen- Y sion of use.

The coarser and steeperpitch of the screw S, of the'fuel gas controlA valve stem enables me, by an approximate quarter `turn thereof, or less, to quickly augment or reduce the supply of fuel gas to the ejector chamber, accordingto requirements, whereas the slower responsive action of the oxygen supply valve stem tends to prevent Ythe blowing out of the flame by an excess of oxygen.

vvThe latter is delivered to the constrictive nozzleC, through the jet pipe e2, which projects `the stream of oxygen under pressure into the opposed end of the convergentconstrictor passage c, which'passage c, is formed with the contracted medial port 0, opening into kthe outward vflare c2, with which the discharge spout D, communicates, as shown in'F ig. 2. The stream of oxygen thus forcefully propelled through the jet e2, into the relatively wide Vfunnel shaped mouth the admixture under pressure to the discharge spout D, by which it is conducted to .theiburner tip t,-the force of this oxygen vehicle stream, combined with the narrowness of the medial port c', effectually counteracting any possible back pressure, and insuring continuous delivery to the flame.

It isfto be noted that the constrictive nozzle C, is screw-connected with the ejector section E; and it is formed externally for contactual engagement with a wrench or other mechanical expedient whereby it may be conveniently loosened or tightened 4in position. Thus in Fig. 1, of the drawings it is shown as formed for Vthis purpose with a hexagonal wrench bearing portion 0*, although I do not limit myself to this identical structure, 'the essential lfeature in this respect beine ythe formationfof the constrictive nozzle in such mannerthat it may be readily unscrewed and detached for cleansing purposes, and as readily replaced.

In fact one vof the distinctive features of my whole contrivance is that practically all the component partsthereof are readily `detachable, and readily assembled, so that the Whole device may be 'kept clean and in good operative condition, or replacement of parts conveniently effected, as may be found expedient.

The detachable securing oftheconstrictive nozzleC, to the ejector section E, is of especial importance in that it affords ready access -to the oxygen jet e2, for the purpose'of clearing the relatively narrow outlet thereof in oase of clogging, as by 'gas precipitates.

Another important advantage attained lby my improved constructionof jewelers torch, is the ease with which Vthe `liame may be varied and regulated to suit the requirements and character of the work/to be done. Thus, by a slight movement of thumb 0r index finger of the hand manipulating the implement, or of both finger and thumb, the relative proportions of fuel gas and oxygen may immediately be changed, as desired, by

the adjustment of the valves without change of hold, or 'resort to other aid. This quick adaptability to the varying requirements of practical use is animportant economic factor in jewelry factories, where vhigh priced skilled labor is indispensable. Furthermore, the accurac and scope of adjustment of flame a-l'l'orv ed, both as to character and pressureadapt my appliance, in the hands of an expert workman, to an extended field of work and utility,-as for instance, from the Vuse of a relatively softv brush flame lfor dainty and delicate operations tothe production of welding or melting heat, as required; all of which may be accomplished by simple finger manipulation of the control valves by the hand in which the implement is held.

It is to be understood that by the term oxygen as used herein, I include atmospheric oxygen, since air under pressure may be used in connection with the fuel gas in onse of necessity or preference.

What I claim and desire to secure by Letters Patent is In a jewelers torch of the character designated, in combination, a bifistulous ejector section, a needle valve controlling the admission of fuel as thereto, a needle valve controlling the amission of Oxygen thereto, the stem of the fuel gas control needle valve being formed with a screw thread of steeper pitch than that, on the stem of the oxygen control needle Valve, both valve stems being formed with radially protuberant fin er rests, a. constrictive nozzle connected wlth said ejector section and formed with a convergently contracted dischar e port, and an oxygen jet in alinement wit said convergently contracted discharge port and communiceting with said Oxygen controlling valve, for the purpose described.

SAM W. HOKE. Witnesses:

DOROTHY MIATT, GEO. WM. MIA'IT. 

